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Description: Increased P Assimilation of Fast-growing Heterotrophs Increases P Capture Potential...
Increased P Assimilation of Fast-growing Heterotrophs Increases P Capture Potential in High-rate Activated Sludge Systems
Abstract
Increased N assimilation by fast growing carbon adsorption heterotrophic organisms (AHOs) was recognized previously as a key explanatory factor leading to higher than expected nitrogen removal in high-rate activated sludge (HRAS) systems. However, the P assimilation stoichiometry and contribution to overall P removal in HRAS of AHOs has to date not been investigated. This study confirmed increased P assimilation in high-rate systems without chemical P removal based on two pilot studies. The SUMO2C model was calibrated to predict observed P assimilation, removal, and content of the HRAS sludge. Current models have significantly underestimated the potential of HRAS for nutrient capture, especially at sludge retention time (SRTs) ≤ 0.5 days.
Phosphorus assimilation of activated sludge was observed to increase with decreasing SRT (Truong et al., WEFTEC, 2020). Therefore, in this paper, a calibrated model from Hauduc (2019) was used to match the observed phosphorus assimilation derived from data. To match the observed phosphorus assimilation, the P content of AHOs parameter from SUMO19 model was modified.
SpeakerTruong, Howard
Presentation time
13:45:00
13:55:00
Session time
13:30:00
14:30:00
SessionPopulation Dynamics: Latest Update on EBPR Research
Session number307
TopicAdvanced Level, Fundamental Level, Nutrients, Research and Innovation
TopicAdvanced Level, Fundamental Level, Nutrients, Research and Innovation
Author(s)
Howard Truong
Author(s)H.M. Truong1; N. Ngo2; A. Massoudieh3; C.B. Bott4; C. deBarbadillo5; J. Jimenez6; H. Hauduc7; I. Takacs8; G. Wells9; H. De Clippeleir010;
Author affiliation(s)District of Columbia Waterand Sewer Authority, DC1,2,10Department of Civil and Environmental Engineering, Northwestern University, IL1Department of Civil and Environmental Engineering, The Catholic University of America, DC2,3Hampton Road Sanitation District, VA4Black and Veatch, MD5Dynamita, Sigale, FR7,8
SourceProceedings of the Water Environment Federation
Document typeConference Paper
PublisherWater Environment Federation
Print publication date Oct 2021
DOI10.2175/193864718825158056
Volume / Issue
Content sourceWEFTEC
Copyright2021
Word count16

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